[ViewVC] Diff of: cvs/libecb/ecb.h

Comparing libecb/ecb.h (file contents):
Revision 1.95 by root, Tue May 29 21:06:01 2012 UTC vs.
Revision 1.139 by root, Tue Oct 14 14:39:06 2014 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
32		43
33	/* 16 bits major, 16 bits minor */	44	/* 16 bits major, 16 bits minor */
34	#define ECB_VERSION 0x00010001	45	#define ECB_VERSION 0x00010003
35		46
36	#ifdef _WIN32	47	#ifdef _WIN32
37	typedef signed char int8_t;	48	typedef signed char int8_t;
38	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
39	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
54	#else	65	#else
55	#define ECB_PTRSIZE 4	66	#define ECB_PTRSIZE 4
56	typedef uint32_t uintptr_t;	67	typedef uint32_t uintptr_t;
57	typedef int32_t intptr_t;	68	typedef int32_t intptr_t;
58	#endif	69	#endif
59	typedef intptr_t ptrdiff_t;
60	#else	70	#else
61	#include <inttypes.h>	71	#include <inttypes.h>
62	#if UINTMAX_MAX > 0xffffffffU	72	#if UINTMAX_MAX > 0xffffffffU
63	#define ECB_PTRSIZE 8	73	#define ECB_PTRSIZE 8
64	#else	74	#else
65	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
		76	#endif
		77	#endif
		78
		79	/* work around x32 idiocy by defining proper macros */
		80	#if __amd64 \|\| __x86_64 \|\| _M_AMD64 \|\| _M_X64
		81	#if _ILP32
		82	#define ECB_AMD64_X32 1
		83	#else
		84	#define ECB_AMD64 1
66	#endif	85	#endif
67	#endif	86	#endif
68		87
69	/* many compilers define _GNUC_ to some versions but then only implement	88	/* many compilers define _GNUC_ to some versions but then only implement
70	* what their idiot authors think are the "more important" extensions,	89	* what their idiot authors think are the "more important" extensions,
71	* causing enormous grief in return for some better fake benchmark numbers.	90	* causing enormous grief in return for some better fake benchmark numbers.
72	* or so.	91	* or so.
73	* we try to detect these and simply assume they are not gcc - if they have	92	* we try to detect these and simply assume they are not gcc - if they have
74	* an issue with that they should have done it right in the first place.	93	* an issue with that they should have done it right in the first place.
75	*/	94	*/
76	#ifndef ECB_GCC_VERSION
77	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	95	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
78	#define ECB_GCC_VERSION(major,minor) 0	96	#define ECB_GCC_VERSION(major,minor) 0
79	#else	97	#else
80	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	98	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
81	#endif	99	#endif
82	#endif
83		100
84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	101	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	102
86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	103	#if __clang__ && defined(__has_builtin)
		104	#define ECB_CLANG_BUILTIN(x) __has_builtin(x)
		105	#else
		106	#define ECB_CLANG_BUILTIN(x) 0
		107	#endif
		108
87	#define ECB_CPP (__cplusplus+0)	109	#define ECB_CPP (__cplusplus+0)
88	#define ECB_CPP98 (__cplusplus >= 199711L)
89	#define ECB_CPP11 (__cplusplus >= 201103L)	110	#define ECB_CPP11 (__cplusplus >= 201103L)
		111
		112	#if ECB_CPP
		113	#define ECB_C 0
		114	#define ECB_STDC_VERSION 0
		115	#else
		116	#define ECB_C 1
		117	#define ECB_STDC_VERSION __STDC_VERSION__
		118	#endif
		119
		120	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		121	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		122
		123	#if ECB_CPP
		124	#define ECB_EXTERN_C extern "C"
		125	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		126	#define ECB_EXTERN_C_END }
		127	#else
		128	#define ECB_EXTERN_C extern
		129	#define ECB_EXTERN_C_BEG
		130	#define ECB_EXTERN_C_END
		131	#endif
90		132
91	/*****************************************************************************/	133	/*****************************************************************************/
92		134
93	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	135	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
94	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	136	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
…		…
117	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	159	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
118	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	160	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
119	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	161	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
120	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	162	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
121	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	163	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		164	#elif __aarch64__
		165	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
122	#elif __sparc \|\| __sparc__	166	#elif (__sparc \|\| __sparc__) && !__sparcv8
123	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
124	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
125	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
126	#elif defined __s390__ \|\| defined __s390x__	170	#elif defined __s390__ \|\| defined __s390x__
127	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
128	#elif defined __mips__	172	#elif defined __mips__
		173	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		174	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
129	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	175	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
130	#elif defined __alpha__	176	#elif defined __alpha__
131	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
132	#elif defined __hppa__	178	#elif defined __hppa__
133	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")	179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
134	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	180	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
135	#elif defined __ia64__	181	#elif defined __ia64__
136	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")	182	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		183	#elif defined __m68k__
		184	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		185	#elif defined __m88k__
		186	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		187	#elif defined __sh__
		188	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
137	#endif	189	#endif
138	#endif	190	#endif
139	#endif	191	#endif
140		192
141	#ifndef ECB_MEMORY_FENCE	193	#ifndef ECB_MEMORY_FENCE
142	#if ECB_GCC_VERSION(4,7)	194	#if ECB_GCC_VERSION(4,7)
143	/* see comment below about the C11 memory model. in short - avoid */	195	/* see comment below (stdatomic.h) about the C11 memory model. */
144	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	196	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		197	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		198	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		199
		200	/* The __has_feature syntax from clang is so misdesigned that we cannot use it
		201	* without risking compile time errors with other compilers. We could
		202	* define our own ecb_clang_has_feature, but I just can't be bothered to work
		203	* around this shit time and again.
145	#elif defined __clang && __has_feature (cxx_atomic)	204	* #elif defined __clang && __has_feature (cxx_atomic)
146	/* see above */	205	* // see comment below (stdatomic.h) about the C11 memory model.
147	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	206	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		207	* #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		208	* #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		209	*/
		210
148	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	211	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
149	#define ECB_MEMORY_FENCE __sync_synchronize ()	212	#define ECB_MEMORY_FENCE __sync_synchronize ()
		213	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		214	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		215	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		216	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		217	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		218	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
150	#elif _MSC_VER >= 1400 /* VC++ 2005 */	219	#elif _MSC_VER >= 1400 /* VC++ 2005 */
151	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	220	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
152	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	221	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
153	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	222	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
154	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	223	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
168	#ifndef ECB_MEMORY_FENCE	237	#ifndef ECB_MEMORY_FENCE
169	#if ECB_C11 && !defined __STDC_NO_ATOMICS__	238	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
170	/* we assume that these memory fences work on all variables/all memory accesses, */	239	/* we assume that these memory fences work on all variables/all memory accesses, */
171	/* not just C11 atomics and atomic accesses */	240	/* not just C11 atomics and atomic accesses */
172	#include <stdatomic.h>	241	#include <stdatomic.h>
173	/* unfortunately, the C11 memory model seems to be very limited, and unable to express */	242	/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
174	/* simple barrier semantics. That means we need to take out thor's hammer. */	243	/* any fence other than seq_cst, which isn't very efficient for us. */
		244	/* Why that is, we don't know - either the C11 memory model is quite useless */
		245	/* for most usages, or gcc and clang have a bug */
		246	/* I currently lean towards the latter, and inefficiently implement */
		247	/* all three of ecb's fences as a seq_cst fence */
		248	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		249	/* for all __atomic_thread_fence's except seq_cst */
175	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	250	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
176	#endif	251	#endif
177	#endif	252	#endif
178		253
179	#ifndef ECB_MEMORY_FENCE	254	#ifndef ECB_MEMORY_FENCE
…		…
229	#define ECB_STRINGIFY_(a) # a	304	#define ECB_STRINGIFY_(a) # a
230	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	305	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
231		306
232	#define ecb_function_ ecb_inline	307	#define ecb_function_ ecb_inline
233		308
234	#if ECB_GCC_VERSION(3,1)	309	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
235	#define ecb_attribute(attrlist) __attribute__(attrlist)	310	#define ecb_attribute(attrlist) __attribute__(attrlist)
		311	#else
		312	#define ecb_attribute(attrlist)
		313	#endif
		314
		315	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
236	#define ecb_is_constant(expr) __builtin_constant_p (expr)	316	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		317	#else
		318	/* possible C11 impl for integral types
		319	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		320	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		321
		322	#define ecb_is_constant(expr) 0
		323	#endif
		324
		325	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
237	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	326	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		327	#else
		328	#define ecb_expect(expr,value) (expr)
		329	#endif
		330
		331	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
238	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	332	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
239	#else	333	#else
240	#define ecb_attribute(attrlist)
241	#define ecb_is_constant(expr) 0
242	#define ecb_expect(expr,value) (expr)
243	#define ecb_prefetch(addr,rw,locality)	334	#define ecb_prefetch(addr,rw,locality)
244	#endif	335	#endif
245		336
246	/* no emulation for ecb_decltype */	337	/* no emulation for ecb_decltype */
247	#if ECB_GCC_VERSION(4,5)	338	#if ECB_GCC_VERSION(4,5)
248	#define ecb_decltype(x) __decltype(x)	339	#define ecb_decltype(x) __decltype(x)
249	#elif ECB_GCC_VERSION(3,0)	340	#elif ECB_GCC_VERSION(3,0)
250	#define ecb_decltype(x) __typeof(x)	341	#define ecb_decltype(x) __typeof(x)
251	#endif	342	#endif
252		343
		344	#if _MSC_VER >= 1300
		345	#define ecb_deprecated __declspec(deprecated)
		346	#else
		347	#define ecb_deprecated ecb_attribute ((__deprecated__))
		348	#endif
		349
253	#define ecb_noinline ecb_attribute ((__noinline__))	350	#define ecb_noinline ecb_attribute ((__noinline__))
254	#define ecb_unused ecb_attribute ((__unused__))	351	#define ecb_unused ecb_attribute ((__unused__))
255	#define ecb_const ecb_attribute ((__const__))	352	#define ecb_const ecb_attribute ((__const__))
256	#define ecb_pure ecb_attribute ((__pure__))	353	#define ecb_pure ecb_attribute ((__pure__))
257		354
		355	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
258	#if ECB_C11	356	#if ECB_C11
259	#define ecb_noreturn _Noreturn	357	#define ecb_noreturn _Noreturn
260	#else	358	#else
261	#define ecb_noreturn ecb_attribute ((__noreturn__))	359	#define ecb_noreturn ecb_attribute ((__noreturn__))
262	#endif	360	#endif
…		…
279	/* for compatibility to the rest of the world */	377	/* for compatibility to the rest of the world */
280	#define ecb_likely(expr) ecb_expect_true (expr)	378	#define ecb_likely(expr) ecb_expect_true (expr)
281	#define ecb_unlikely(expr) ecb_expect_false (expr)	379	#define ecb_unlikely(expr) ecb_expect_false (expr)
282		380
283	/* count trailing zero bits and count # of one bits */	381	/* count trailing zero bits and count # of one bits */
284	#if ECB_GCC_VERSION(3,4)	382	#if ECB_GCC_VERSION(3,4) \
		383	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		384	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		385	&& ECB_CLANG_BUILTIN(__builtin_popcount))
285	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	386	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
286	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	387	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
287	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	388	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
288	#define ecb_ctz32(x) __builtin_ctz (x)	389	#define ecb_ctz32(x) __builtin_ctz (x)
289	#define ecb_ctz64(x) __builtin_ctzll (x)	390	#define ecb_ctz64(x) __builtin_ctzll (x)
…		…
420	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	521	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
421	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	522	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
422	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	523	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
423	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	524	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
424		525
425	#if ECB_GCC_VERSION(4,3)	526	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
426	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	527	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
427	#define ecb_bswap32(x) __builtin_bswap32 (x)	528	#define ecb_bswap32(x) __builtin_bswap32 (x)
428	#define ecb_bswap64(x) __builtin_bswap64 (x)	529	#define ecb_bswap64(x) __builtin_bswap64 (x)
429	#else	530	#else
430	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	531	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
…		…
447	{	548	{
448	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	549	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
449	}	550	}
450	#endif	551	#endif
451		552
452	#if ECB_GCC_VERSION(4,5)	553	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
453	#define ecb_unreachable() __builtin_unreachable ()	554	#define ecb_unreachable() __builtin_unreachable ()
454	#else	555	#else
455	/* this seems to work fine, but gcc always emits a warning for it :/ */	556	/* this seems to work fine, but gcc always emits a warning for it :/ */
456	ecb_inline void ecb_unreachable (void) ecb_noreturn;	557	ecb_inline void ecb_unreachable (void) ecb_noreturn;
457	ecb_inline void ecb_unreachable (void) { }	558	ecb_inline void ecb_unreachable (void) { }
458	#endif	559	#endif
459		560
460	/* try to tell the compiler that some condition is definitely true */	561	/* try to tell the compiler that some condition is definitely true */
461	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	562	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
462		563
463	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	564	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
464	ecb_inline unsigned char	565	ecb_inline unsigned char
465	ecb_byteorder_helper (void)	566	ecb_byteorder_helper (void)
466	{	567	{
467	const uint32_t u = 0x11223344;	568	/* the union code still generates code under pressure in gcc, */
468	return (unsigned char )&u;	569	/* but less than using pointers, and always seems to */
		570	/* successfully return a constant. */
		571	/* the reason why we have this horrible preprocessor mess */
		572	/* is to avoid it in all cases, at least on common architectures */
		573	/* or when using a recent enough gcc version (>= 4.6) */
		574	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64
		575	return 0x44;
		576	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
		577	return 0x44;
		578	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
		579	return 0x11;
		580	#else
		581	union
		582	{
		583	uint32_t i;
		584	uint8_t c;
		585	} u = { 0x11223344 };
		586	return u.c;
		587	#endif
469	}	588	}
470		589
471	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	590	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
472	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	591	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
473	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	592	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
…		…
504	}	623	}
505	#else	624	#else
506	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	625	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
507	#endif	626	#endif
508		627
		628	/*******************************************************************************/
		629	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		630
		631	/* basically, everything uses "ieee pure-endian" floating point numbers */
		632	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		633	#if 0 \
		634	\|\| __i386 \|\| __i386__ \
		635	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \
		636	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		637	\|\| defined __s390__ \|\| defined __s390x__ \
		638	\|\| defined __mips__ \
		639	\|\| defined __alpha__ \
		640	\|\| defined __hppa__ \
		641	\|\| defined __ia64__ \
		642	\|\| defined __m68k__ \
		643	\|\| defined __m88k__ \
		644	\|\| defined __sh__ \
		645	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64 \
		646	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		647	\|\| defined __aarch64__
		648	#define ECB_STDFP 1
		649	#include <string.h> /* for memcpy */
		650	#else
		651	#define ECB_STDFP 0
		652	#endif
		653
		654	#ifndef ECB_NO_LIBM
		655
		656	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		657
		658	/* only the oldest of old doesn't have this one. solaris. */
		659	#ifdef INFINITY
		660	#define ECB_INFINITY INFINITY
		661	#else
		662	#define ECB_INFINITY HUGE_VAL
509	#endif	663	#endif
510		664
		665	#ifdef NAN
		666	#define ECB_NAN NAN
		667	#else
		668	#define ECB_NAN ECB_INFINITY
		669	#endif
		670
		671	/* converts an ieee half/binary16 to a float */
		672	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
		673	ecb_function_ float
		674	ecb_binary16_to_float (uint16_t x)
		675	{
		676	int e = (x >> 10) & 0x1f;
		677	int m = x & 0x3ff;
		678	float r;
		679
		680	if (!e ) r = ldexpf (m , -24);
		681	else if (e != 31) r = ldexpf (m + 0x400, e - 25);
		682	else if (m ) r = ECB_NAN;
		683	else r = ECB_INFINITY;
		684
		685	return x & 0x8000 ? -r : r;
		686	}
		687
		688	/* convert a float to ieee single/binary32 */
		689	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
		690	ecb_function_ uint32_t
		691	ecb_float_to_binary32 (float x)
		692	{
		693	uint32_t r;
		694
		695	#if ECB_STDFP
		696	memcpy (&r, &x, 4);
		697	#else
		698	/* slow emulation, works for anything but -0 */
		699	uint32_t m;
		700	int e;
		701
		702	if (x == 0e0f ) return 0x00000000U;
		703	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		704	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		705	if (x != x ) return 0x7fbfffffU;
		706
		707	m = frexpf (x, &e) * 0x1000000U;
		708
		709	r = m & 0x80000000U;
		710
		711	if (r)
		712	m = -m;
		713
		714	if (e <= -126)
		715	{
		716	m &= 0xffffffU;
		717	m >>= (-125 - e);
		718	e = -126;
		719	}
		720
		721	r \|= (e + 126) << 23;
		722	r \|= m & 0x7fffffU;
		723	#endif
		724
		725	return r;
		726	}
		727
		728	/* converts an ieee single/binary32 to a float */
		729	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
		730	ecb_function_ float
		731	ecb_binary32_to_float (uint32_t x)
		732	{
		733	float r;
		734
		735	#if ECB_STDFP
		736	memcpy (&r, &x, 4);
		737	#else
		738	/* emulation, only works for normals and subnormals and +0 */
		739	int neg = x >> 31;
		740	int e = (x >> 23) & 0xffU;
		741
		742	x &= 0x7fffffU;
		743
		744	if (e)
		745	x \|= 0x800000U;
		746	else
		747	e = 1;
		748
		749	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		750	r = ldexpf (x * (0.5f / 0x800000U), e - 126);
		751
		752	r = neg ? -r : r;
		753	#endif
		754
		755	return r;
		756	}
		757
		758	/* convert a double to ieee double/binary64 */
		759	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
		760	ecb_function_ uint64_t
		761	ecb_double_to_binary64 (double x)
		762	{
		763	uint64_t r;
		764
		765	#if ECB_STDFP
		766	memcpy (&r, &x, 8);
		767	#else
		768	/* slow emulation, works for anything but -0 */
		769	uint64_t m;
		770	int e;
		771
		772	if (x == 0e0 ) return 0x0000000000000000U;
		773	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		774	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		775	if (x != x ) return 0X7ff7ffffffffffffU;
		776
		777	m = frexp (x, &e) * 0x20000000000000U;
		778
		779	r = m & 0x8000000000000000;;
		780
		781	if (r)
		782	m = -m;
		783
		784	if (e <= -1022)
		785	{
		786	m &= 0x1fffffffffffffU;
		787	m >>= (-1021 - e);
		788	e = -1022;
		789	}
		790
		791	r \|= ((uint64_t)(e + 1022)) << 52;
		792	r \|= m & 0xfffffffffffffU;
		793	#endif
		794
		795	return r;
		796	}
		797
		798	/* converts an ieee double/binary64 to a double */
		799	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
		800	ecb_function_ double
		801	ecb_binary64_to_double (uint64_t x)
		802	{
		803	double r;
		804
		805	#if ECB_STDFP
		806	memcpy (&r, &x, 8);
		807	#else
		808	/* emulation, only works for normals and subnormals and +0 */
		809	int neg = x >> 63;
		810	int e = (x >> 52) & 0x7ffU;
		811
		812	x &= 0xfffffffffffffU;
		813
		814	if (e)
		815	x \|= 0x10000000000000U;
		816	else
		817	e = 1;
		818
		819	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		820	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		821
		822	r = neg ? -r : r;
		823	#endif
		824
		825	return r;
		826	}
		827
		828	#endif
		829
		830	#endif
		831

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Comparing libecb/ecb.h (file contents): Revision 1.95 by root, Tue May 29 21:06:01 2012 UTC vs. Revision 1.139 by root, Tue Oct 14 14:39:06 2014 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.95 by root, Tue May 29 21:06:01 2012 UTC vs.
Revision 1.139 by root, Tue Oct 14 14:39:06 2014 UTC